output: stem

[nikita-moor]

Could you, please, add a "stem" of the word in addition to the "ending":

[{
  "word": "diem",
  "defs": [{
    "orth": ["dies", "die"],
    "infls": [{
      "ending": "em",
      "pos": "noun",
      "form": {
        "declension": "accusative",
        "number": "singular",
        "gender": "C"
      }
    }]
  }]
}]